In the probe() function radio->int_in_urb was not killed if an error occurred in the probe sequence. It was also missing in the disconnect.
This caused this syzbot issue: https://syzkaller.appspot.com/bug?extid=2d4fc2a0c45ad8da7e99 Signed-off-by: Hans Verkuil <hverkuil-ci...@xs4all.nl> Reported-and-tested-by: syzbot+2d4fc2a0c45ad8da7...@syzkaller.appspotmail.com --- diff --git a/drivers/media/radio/si470x/radio-si470x-usb.c b/drivers/media/radio/si470x/radio-si470x-usb.c index 49073747b1e7..fedff68d8c49 100644 --- a/drivers/media/radio/si470x/radio-si470x-usb.c +++ b/drivers/media/radio/si470x/radio-si470x-usb.c @@ -734,7 +734,7 @@ static int si470x_usb_driver_probe(struct usb_interface *intf, /* start radio */ retval = si470x_start_usb(radio); if (retval < 0) - goto err_all; + goto err_buf; /* set initial frequency */ si470x_set_freq(radio, 87.5 * FREQ_MUL); /* available in all regions */ @@ -749,6 +749,8 @@ static int si470x_usb_driver_probe(struct usb_interface *intf, return 0; err_all: + usb_kill_urb(radio->int_in_urb); +err_buf: kfree(radio->buffer); err_ctrl: v4l2_ctrl_handler_free(&radio->hdl); @@ -822,6 +824,7 @@ static void si470x_usb_driver_disconnect(struct usb_interface *intf) mutex_lock(&radio->lock); v4l2_device_disconnect(&radio->v4l2_dev); video_unregister_device(&radio->videodev); + usb_kill_urb(radio->int_in_urb); usb_set_intfdata(intf, NULL); mutex_unlock(&radio->lock); v4l2_device_put(&radio->v4l2_dev);
